Year   Concerts Seen  
2015 1 concert
2014 1 concert
2013 2 concerts
2012 3 concerts
2011 2 concerts
2010 5 concerts
2009 6 concerts
2008 6 concerts
2007 2 concerts
2006 4 concerts
2005 1 concert
2004 4 concerts
2003 2 concerts
2002 4 concerts
2001 1 concert
2000 1 concert
1999 4 concerts
1998 4 concerts
1997 6 concerts
1996 2 concerts
1995 3 concerts
1994 3 concerts
1993 2 concerts
1992 6 concerts
1991 2 concerts
1990 1 concert
1988 4 concerts
1986 2 concerts
1985 2 concerts
1984 3 concerts
1983 4 concerts
1982 5 concerts
1981 7 concerts